Debnath Rahul, Bhattacharyya Bhramar, Koner Anamika, Barik Anandamay
Ecology Research Laboratory, Department of Zoology, The University of Burdwan, Burdwan, India.
Pest Manag Sci. 2023 Nov;79(11):4295-4308. doi: 10.1002/ps.7627. Epub 2023 Jul 11.
First to third instars of Diaphania indica (Saunders) (Lepidoptera: Crambidae) feed on the lower surface of leaves, while fourth and fifth instars gregariously consume leaves of Trichosanthes anguina L. After defoliating, the caterpillar also attacks flowers and fruits of the plant and finally, results in loss of crop yield. Therefore, behavioral responses of D. indica adults were investigated to volatiles from undamaged (UD), insect-damaged (ID, plants after feeding by D. indica larvae) and jasmonic acid (JA) treated T. anguina plants.
Females showed attraction to volatiles of UD and ID plants of three T. anguina cultivars [MNSR-1 (MNS), Baruipur Long (BAR) and Polo No. 1 (POLO)] in Y-tube olfactometer bioassays. Females did not show significant negative responses from volatiles of JA treated plants. Females were more attracted to volatiles of ID plants than UD plants. Females showed attraction to volatiles of UD or ID plants compared to JA treated plants. Females were attracted to certain synthetic blends resembling volatiles of insect-damaged MNS, BAR and POLO plants in olfactometer bioassays. Females could not distinguish among these three certain synthetic blends in olfactometer bioassays. A synthetic blend of 3Z-hexen-1-ol, α-pinene, hexyl acetate, benzyl alcohol and 6Z-nonenal at mole ratios of 1.47:1.20:1:1.82:1.21 was prepared at 20 mg/mL dichloromethane and 100 μL when used as lure in funnel traps resulted in the capture of the highest number of D. indica adults in field trails.
The earlier five-component chemical lure could be used in traps in an integrated pest management program of the insect pest, D. indica. © 2023 Society of Chemical Industry.
瓜绢螟（桑德氏瓜绢螟）（鳞翅目：草螟科）的一至三龄幼虫取食叶片下表面，而四龄和五龄幼虫则群居取食蛇瓜的叶片。叶片被吃光后，幼虫还会攻击植株的花和果实，最终导致作物减产。因此，研究了瓜绢螟成虫对未受损（UD）、受昆虫取食损害（ID，瓜绢螟幼虫取食后的植株）以及经茉莉酸（JA）处理的蛇瓜植株挥发物的行为反应。
在Y型嗅觉仪生物测定中，雌性瓜绢螟成虫对三种蛇瓜品种[MNSR-1（MNS）、 Baruipur Long（BAR）和Polo No. 1（POLO）]的未受损和受昆虫取食损害植株的挥发物表现出趋性。雌性瓜绢螟成虫对经茉莉酸处理植株的挥发物未表现出明显的负反应。相较于未受损植株的挥发物，雌性瓜绢螟成虫对受昆虫取食损害植株的挥发物更具趋性。与经茉莉酸处理植株的挥发物相比，雌性瓜绢螟成虫对未受损或受昆虫取食损害植株的挥发物表现出趋性。在嗅觉仪生物测定中，雌性瓜绢螟成虫对某些类似于受昆虫取食损害的MNS、BAR和POLO植株挥发物的合成混合物表现出趋性。在嗅觉仪生物测定中，雌性瓜绢螟成虫无法区分这三种特定的合成混合物。以20 mg/mL二氯甲烷配制摩尔比为1.47:1.20:1:1.82:1.21的3Z-己烯-1-醇、α-蒎烯、乙酸己酯、苯甲醇和6Z-壬烯醛的合成混合物，当100 μL用作诱捕器中的诱饵时，在田间试验中捕获到的瓜绢螟成虫数量最多。
早期的五成分化学诱饵可用于瓜绢螟害虫综合防治计划中的诱捕器。© 2023化学工业协会。
